Can.
435 A metropolitan, who is the archbishop of his diocese, presides offer
an ecclesiastical province. The office of metropolitan is joined with an
episcopal see determined or approved by the Roman Pontiff.

Can. 436 §1. In
the suffragan dioceses, a metropolitan is competent:

1/ to exercise vigilance so that the faith and
ecclesiastical discipline are observed carefully and to inform the Roman
Pontiff of abuses, if there are any;

2/ to conduct a canonical visitation for a cause
previously approved by the Apostolic See if a suffragan has neglected it;

3/ to designate a diocesan administrator according
to the norm of cann. ⇒ 421, §2, and ⇒ 425,
§3.

§2. Where circumstances demand it, the Apostolic See
can endow a metropolitan with special functions and power to be determined in
particular law.

§3. The metropolitan has no other power of
governance in the suffragan dioceses. He can perform sacred functions, however,
as if he were a bishop in his own diocese in all churches, but he is first to
inform the diocesan bishop if the church is the cathedral.

Can.
437 §1. Within three months from the reception of episcopal consecration or if
he has already been consecrated, from the canonical provision, a metropolitan
is obliged to request the pallium from the Roman Pontiff either personally or
through a proxy. The pallium signifies the power which the metropolitan, in
communion with the Roman Church, has by law in his own province.

§2. A metropolitan can use the pallium according to
the norm of liturgical laws within any church of the ecclesiastical province
offer which he presides, but not outside it, even if the diocesan bishop gives
his assent.

§3. A metropolitan needs a new pallium if he is
transferred to another metropolitan see.

Can. 438 The
titles of patriarch and primate entail no power of governance in the Latin
Church apart from a prerogative of honor unless in some matters the contrary is
clear from apostolic privilege or approved custom.